Japanese era date昭和17年12月21日 (月)
Shōwa 17 . 12 . 21 (Mon)Gregorian date: Monday, December 21st 1942
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TodayShort form: S17.12.21
Zodiac year: Year of the Water Horse · 壬午 (mizunoe-uma)
Traditional month name: 師走 (shiwasu)
The Shōwa era started on December 25th 1926 and ended on January 7th 1989.
The emperor during this era was Emperor Hirohito.